Senior Software Engineer (.NET / React)

About the job: Sogeti is seeking a Senior Software Engineer to support the re-platforming of a complex, rules-heavy middleware system using .NET v10 latest LTS, React, and Microsoft SQL Server. This is a hands-on, execution-focused role working closely with a Solution Architect to understand existing system behavior, implement new backend services and frontend experiences, and ensure functional parity with the current platform. The ideal candidate is comfortable working in ambiguous environments, uses AI tools effectively, and takes ownership of correctness and code quality.

What you will do at Sogeti:

• Backend Development:
• Implement backend services and APIs using .NET v10 latest LTS
• Translate complex business rules and decision logic into clear, testable code
• Participate in refactoring and decomposition of legacy middleware logic
• Ensure correctness, performance, and reliability of rule execution pipelines

Frontend Development:

• Build React user interfaces from Figma designs with high fidelity
• Translate UX and visual designs into clean, maintainable components
• Integrate frontend applications with API-driven backend services
• Maintain consistent behavior and validation rules across frontend and backend

AI-Augmented Development:

• Use AI tools to accelerate code generation, refactoring, and analysis
• Assist in extracting and validating rules from legacy behavior using AI support
• Review and validate all AI-generated code and documentation
• Contribute to team best practices for responsible AI use in development

Collaboration and Code Quality:

• Work closely with architects and peers to clarify requirements and edge cases
• Participate in code reviews and design discussions
• Write unit and integration tests for complex logic paths
• Help identify behavioral gaps between the existing and new systems

What you will bring:

• 6+ years of professional software engineering experience
• Strong hands-on experience with .NET v10 latest LTS and C#
• Strong experience with React and modern frontend development
• Experience working with Microsoft SQL Server and data-driven systems
• Proven ability to work in large, complex codebases with minimal documentation

Preferred Qualifications:

• Experience working on rules-heavy or decision-driven systems
• Experience re-platforming or modernizing legacy applications
• Practical experience using AI tools as part of daily development work
• Experience converting Figma designs into production-ready frontend code

What Success Looks Like:

• Complex business rules are implemented accurately and transparently
• Frontend experiences match design intent and integrate cleanly with backend logic
• AI is used to accelerate development while maintaining code ownership and quality
• The new system behaves predictably and aligns with existing platform outcomes

Education:

• Bachelor’s or Master’s in HCI, Psychology, Anthropology, Design, or related field.

Life at Sogeti: Sogeti supports all aspects of your well-being throughout the changing stages of your life and career. For eligible employees, we offer:

• Flexible work options
• 401(k) with 150% match up to 6%
• Employee Share Ownership Plan
• Medical, Prescription, Dental & Vision Insurance
• Life Insurance
• 100% Company-Paid Mobile Phone Plan
• 3 Weeks PTO + 7 Paid Holidays
• Paid Parental Leave
• Adoption, Surrogacy & Cryopreservation Assistance
• Subsidized Back-up Child/Elder Care & Tutoring
• Career Planning & Coaching
• $5,250 Tuition Reimbursement & 20,000+ Online Courses
• Employee Resource Groups
• Counseling & Support for Physical, Financial, Emotional & Spiritual Well-being
• Disaster Relief Programs

About Sogeti

Part of the Capgemini Group, Sogeti makes business value through technology for organizations that need to implement innovation at speed and want a local partner with global scale. With a hands-on culture and close proximity to its clients, Sogeti implements solutions that will help organizations work faster, better, and smarter. By combining its agility and speed of implementation through a DevOps approach, Sogeti delivers innovative solutions in quality engineering, cloud and application development, all driven by AI, data and automation.

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Disclaimer

Capgemini is an Equal Opportunity Employer encouraging diversity in the workplace. All qualified applicants will receive consideration for employment without regard to race, national origin, gender identity/expression, age, religion, disability, sexual orientation, genetics, veteran status, marital status or any other characteristic protected by law.

This is a general description of the Duties, Responsibilities and Qualifications required for this position. Physical, mental, sensory or environmental demands may be referenced in an attempt to communicate the manner in which this position traditionally is performed. Whenever necessary to provide individuals with disabilities an equal employment opportunity, Capgemini will consider reasonable accommodations that might involve varying job requirements and/or changing the way this job is performed, provided that such accommodations do not pose an undue hardship.

Capgemini is committed to providing reasonable accommodation during our recruitment process. If you need assistance or accommodation, please reach out to your recruiting contact.

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Applicants for employment in the US must have valid work authorization that does not now and/or will not in the future require sponsorship of a visa for employment authorization in the US by Capgemini.

Capgemini discloses salary range information in compliance with state and local pay transparency obligations. The disclosed range represents the lowest to highest salary we, in good faith, believe we would pay for this role at the time of this posting, although we may ultimately pay more or less than the disclosed range, and the range may be modified in the future. The disclosed range takes into account the wide range of factors that are considered in making compensation decisions including, but not limited to, geographic location, relevant education, qualifications, certifications, experience, skills, seniority, performance, sales or revenue-based metrics, and business or organizational needs. At Capgemini, it is not typical for an individual to be hired at

or near the top of the range for their role. The base salary range for the tagged location is $135,000 - $165,000.

This role may be eligible for other compensation including variable compensation, bonus, or commission. Full time regular employees are eligible for paid time off, medical/dental/vision insurance, 401(k), and any other benefits to eligible employees.

Note: No amount of pay is considered to be wages or compensation until such amount is earned, vested, and determinable. The amount and availability of any bonus, commission, or any other form of compensation that are allocable to a particular employee remains in the Company's sole discretion unless and until paid and may be modified at the Company’s sole discretion, consistent with the law.